"Derbent Branch". Official website of the Derbent Branch of the Azerbaijan State University of Economics. Archived from the original on 2019-11-02. Retrieved 2018-06-02.
Azerbaijan Republic State History Archives: Fund 392, List 1, Case 470, Page 13. Photo of Lev Nussimbaum's grade report is published in "Secrets in the Archives: Lev Nussimbaum's Early School Record in Baku," in Azerbaijan International, Vol. 15:2-4 (2011), p. 153. Available in English or Azeri.
"Derbent Branch". Official website of the Derbent Branch of the Azerbaijan State University of Economics. Archived from the original on 2019-11-02. Retrieved 2018-06-02.
"Ali Mamed Abbasov". International Academy of rating technologies and sociology. Archived from the original on 2019-12-16. Retrieved 2018-06-01.